CHO SEUING-HUI

A package mailed to NBC News by Virginia Tech killer Cho Seung-Hui contained disturbing video, writings and photographs of the troubled student. Authorities say Cho killed 32 people and then himself at the Blacksburg, Virginia, campus on Monday, April 16. The network reported the package was mailed at 9:01 am, between two shooting incidents and the photos show Cho handling the two handguns he used in the massacre. NBC News has given the material to investigators.

Here are some of the photos.

Cho's parents are said to be a hard-working couple who speak only a little English and run a dry-cleaning business. Their daughter graduated from Princeton in 2004 and works as a contractor for the State Department. The Chos are said to be cooperating with police; they allowed a 90-minute search of their home on Monday evening.

At Virginia Tech, Cho sometimes referred to himself as Question Mark and spoke in a whisper. It was a big deal to get a hello out of him.

Cho exhibited strange sexual behavior at Virginia Tech

In December 2005, campus police and mental health professionals in Blacksburg, Va., arranged to have Cho committed to a state psychiatric facility. He was taken to St. Albans psychiatric hospital in Radford, Va., on Dec. 13 of that year after two women students (neither of whom was among Cho's shooting victims) called campus police complaining that Cho had made troubling contacts with them.

For years, Cho's odd behavior indicated to some university authorities that he could be dangerous.

In coming weeks, the school will almost certainly have to explain why it did not do more to help him or expel him before his massacre.

This guy was just a cold-blooded, calculated killer. He was deranged and tortured quite alright, but I think he killed those students just because he wanted to be mean and wicked and not because he was mentally ill.

May God judge him.